Voice over IP for the Cisco 2600/3600 Series

Cisco IOS Configuration Guides and Command References
Cisco IOS Release 12.3		Cisco IOS Release 12.1
Cisco IOS Voice Configuration Library, Release 12.3 Cisco IOS Voice Command Reference, Release 12.3		Cisco IOS Multiservice Applications Configuration Guide, Release 12.1 Cisco IOS Multiservice Applications Command Reference, Release 12.1
Cisco IOS Release 12.2		Cisco IOS Release 12.0
Cisco IOS Voice, Video, and Fax Configuration Guide, Release 12.2 Cisco IOS Voice, Video, and Fax Command Reference, Release 12.2		Cisco IOS Release 12.0 Voice, Video, and Home Applications Configuration Guide Cisco IOS Release 12.0 Voice, Video, and Home Applications Command Reference